React Memo | useMemo | useCallback - Optimize Performance of your React Applications 

This explanation and demonstration was amazing, I really understood it! Thank you 🙏🏽

Thank you for this explanation. This is maybe the first video that clearly explains how and when one should use useMemo, useCallback.

This must be like the 10th video I watch about the topic and this is the first time I really understood! Thanks!

Saw so many videos on these topics, And finally found something that stuck the landing for me. This is an important frontend interview topic, thank you so much.

The best explanation of React.memo,useCallback,useMemo. Thank you soo much,have a blessed day Sir.

You explanation makes it so easy to understand. Thanks

Hey, Justin. just wanted to say thank you for your video. one of those few videos I can understand without even looking at the screen. A great explanation.

great video! very simple and direct example to explain the memo concept very clearly. it's a fresher course for me about memorization in React.

the best explanation on the topic I've ever seen Thank you so much

The comment section itself shows how perfect this tutorial is.. No words. Just incredibly easy to understand..

Very informative , Thank you! Been searching for someone who explains advanced react since a while, looks like we have a winner!

This filled a lot of gaps left by other explainers, thank you 🙏

Man, please doing more and don't stop! You have some fantastic topics and go really into detail in all of them!! Just discovered your channel and damn man. I promise you keep going and you will have 500k :D

Dude your'e awsome, to understand usecallback I have read many articles and still left confused. Now youre explanation made me understand . Hats off

Simple content with a deep understanding of React hooks. Look at the statistics, haters do not exist here.

incredible video, the only one that explained clearly and correctly how to use the "areEqual" function. I've been struggling with this for a few days and you helped solve the issue. Thanks for sharing your knowledge

Way you explain things makes everything clear without any doubt, so far best teacher, thank you.

Great one clear understanding of the concept🎉

Awesome explanation, I understood the concept!!. Thank you very much.

Great stuff 👍! Can you please make more videos about react performance and advanced techniques 🙏🙏🙏

Great video on demonstrating the differences of each hook and hoc. Thanks justin!

This is an incredible tutorial. I really like how expand on why things are behaving the way they are, such as when you removed the counter dependency from the useCallback hook. A+ material.

man.. you are incredible.. wish you made more videos like this.. :)

This is a great explanation of those 3 features. Thank you!

Amazing video, the only one that actually explained all the nuances.

Godly explaination...shoutout to you man..great job

Great explanation, concept clear. Thanks!

Amazing work, best example

Very well explained. Thank you!

Thank you for the video, please fetch some time to make such kind of videos

Thank you!! This was the best explanation, simple and easy to understand.

Just awsome .. everything in one video

It took me a while but I understood everything, excellent explanation!!!!

Very informative, thorough, and concise. Good job, Justin. Thanks.

thanks....this is helps me more than videos on other channels:)

Ultimate explanation 👏👏 Understood the concepts clearly now 😍😍 Subscribed

Great explanation on the optimisation! Thanks so much..

you are awesome man , clear and crisp explanation

Damn.. 4 interviews attended, i wasn't able to answer memo, useMemo, useCallback. Now i not just know what are these,i also know why and in which scenarios these can be used. Thank u😃

Once again a wonderful explanation on different react hooks and how to use them properly. thanks for your time. God Bless and Good Health.

Simple and easy to understand. Thank you

wonderful explanation

This is so sick Justin🔥 Amazing explained 🤩

Great explanation. 🔥

thanks a lot, the explanation was clear and easy to understand

awesome explanation thank you

awesome explanation!

Great explanation Justin. Thank you 😊

Thanks for the knowledge

very very help full man thanks thanks very much

Awesome, very instructional. Thanks.

Thanks for the video. I really needed this. Great explanation.

Thanks a lot buddy ...So helpful 😮

Thanks for the clear explanation.

so nicely explained, just wow

Woow great explanation

Thanks for sharing!

a great explanation.

refreshing video

great explanation, thanks!

Really helpful, thank you

Excellent 👌👍🎉🎉

Fantastic explanation. Thank you. ❤️

Thanks for the wonderful explanation...

Thank you for making such a great video!

Thank you! Come back to RU-vid!

Very helpful video! Thank you! :)

An amazing explaination.

Thank you so much Sir! I learned a lot!!

Great video. thank you so much

great job

awesome awesome awesome

you won't notice the component rerendering not because react is fast in the rerendering process but because react did not even update the actual dom while the component props,state, elements did not change

I don't get the difference, both your useMemo and useCallback are functions in your example

Best Out there!

Very good explanation, I'm understood the concept. However, which tools did you use to make this video ?

Nicely explain.

thank you so much

Thank you

One question only? What if child doesn't get the counter as prop but get setCounter as a props, so when we click the child the counter state in Parent changes, but is there a way to stop the child re-render it, TLDR; when child changes parent's state is there a way to stop child from re rendering if child is not getting the changed state as prop because in useCallback it will be a dependency so it will remake the function

Cool work man!

is it possible to avoid re-render the child sibling component if the child component state changes?

thank you pal

So at the end when you talk about the 'memo' high order component and checking if the props are equal in your own function, doesn't this essentially do the same as memoizing the function passed to the child component?

Awesome

hi .. how to use useCallback inside the useEffect

thanks for these

good stuff thx

why u stop making videos? we need a mentor like u

greetings !, excellent video, but I can see the arrow pointing down at the end setCounter, is it an extension?

nice

why not use React.memo( component,isEqual ) to compare coming props's function is same or not and replace React.useCallback() hook , this function can recreate forever but we can stop the renderers :)

18:06

Changing props does not cause a re-render! It is only true if the prop is state, it's changing state that causes a re-render.

Why don't react just do all this stuff out of the box!!?

Excellent explanation of the use of meme, useMemo and useCallback. Thanks PS Subscribed. {2022-10-22}

thank u very much

Really good explanation! Thank you for your work!

excellent explaination in the RU-vid on memorization so far.But please explain an practical use case of memorization so that we can understand where to use this concept..🙂🙂

great video, very helpful, thanks